Shimano FC-R7100 105 12-Speed Inner Chainring

The Shimano FC-R7100 105 12-Speed Inner Chainring is a precise and efficient replacement chainring built to maintain smooth power delivery in modern 12-speed road and TT drivetrains. It uses a Hyperglide+-specific tooth profile to enhance chain contact, boost efficiency, and improve power transfer, giving riders a consistent and stable pedalling feel.

Key Features and Benefits:

• Hyperglide+-specific tooth profile: This tooth shaping matches the unique link design of HG 12-speed chains, which improves chain engagement on each rotation. This increased contact reduces slip and loss of force, resulting in more stable power transfer under load.
• 12-speed chain compatibility: The ring is engineered for HG 12-speed chains only, which ensures exact spacing and alignment. This improves shift tracking during high torque and reduces wear on both the chain and ring, leading to longer service life.
• Optimised 34T or 46T inner gearing: The 34 or 36 tooth size supports compact gearing setups, allowing riders to maintain cadence on steep gradients. This lighter ratio boosts climbing efficiency and reduces strain on the drivetrain.
• Matched for FC-R7100 cranksets: Designed as a direct fit for Shimano 105 R7100 crank arms, it maintains the intended chainline and stiffness of the system. This preserves the drivetrain’s structural integrity and supports clean, controlled shifting.
• Precision-cut 110 mm BCD, 4-arm interface: The CNC-defined dimensions ensure a secure and rigid connection to the crank. This rigidity helps limit flex during heavy pedalling, which improves mechanical efficiency and shift accuracy.
• Genuine Shimano replacement part: Built to Shimano’s production standards, the ring matches the performance of the original component. This ensures consistent function across thousands of cycles and prevents mismatch issues found with non-OEM replacements.

This chainring supports riders who want consistent efficiency in a 12-speed drivetrain by maintaining exact alignment, reliable chain engagement, and predictable load transfer. Its Hyperglide+-specific shaping and matched crankset fit work together to keep the drivetrain stable, even during high torque, without introducing noise or hesitation in the shift sequence.

Select this ring when you need a precise replacement that restores smooth rotation, accurate shifting, and efficient power delivery in your FC-R7100 setup. Its technical design and compatibility ensure your drivetrain continues to perform as intended.

Specification:

• Speed: 12 Speed
• Discipline: Road
• Discipline: Time Trial & Triathlon
• Colour: Black
• Size: 34 or 36 teeth
• Bolt Circle Diameter: 110mm
• Chainring Fitting: 4 Arms
• 34T-NK for 50/34T
• 36T-NH for 52/36T